We keep getting the following traps from up-and-running NT machines?

 1.3.6.1.4.1.311.1.1.3.1.3 Link Down serverNT
 1.3.6.1.4.1.311.1.1.3.1.3 Cold Start serveNT
 1.3.6.1.4.1.311.1.1.3.1.1 Link Down workstationNT
 1.3.6.1.4.1.311.1.1.3.1.1 Cold Start workstationNT

Has anybody any idea why we keep recieving these traps from NT servers and
worksations?

If we can be sure that they do not matter, we can raise a change request and
set these traps to "Log Only" so they do not appear in the browser!!!

Thanks,